science
posted by Juli on .
two spheres carrying charge q are hanging from a same point of suspension with the help of threads of length 1 m in a space free from gravity . the distance between them is?

the downward force on each is mg.
from the vertical, then the angle to one string Theta is given by
kQQ/r^2mg=tanTheta
but sinTheta=r/2L
assuming small angles, sinTheta appx=tantheta
r/2L=kQQ/r^2mg
r^3=kQQL/mg
check that